Zach et al.,

One more F2 option. We use an F2 generator composed of the K2NiF6-KF
("Asprey salt") purchased from a laser manufacturer.  Several companies
(including Lambda Physik) sell the generators as means for boosting the F2 c
ontent of excimer laser gases in situ (i.e., without having to refill
the laser).

Once the generator is exhausted we regenerate the salt using a second
generator and then send the latter to Germany to be refilled. In this way
we have doubly distilled F2 without having a cylinder in the lab.

-Ed Young
 Oxford

> Dear Zach and other F2 users,
>
> Martin Miller just placed the possibility of the Fluorodec electrolytic
> system on the list just a minute before I was going to do the same - so I
> can skip this. I just want to add to his posting that the advantage of this
> electrolytic method is that no purification of F2 gas is needed then any
> more. If using bottle gas, there is a need to purify the F2 (even the high
> purity stuff I understood) e.g. by use of 'Asprey' salt, which is probably
> the best method. This Asprey salt is not quite a pleasant product to handle
> and is extremely hygroscopic too.
> So, I am pleased to hear the Fluorodec system indeed is working to
> satisfaction, as we are informed by Martin Miller - thanks for telling us
> Martin.
> NB - Some details of the Fluorodec system are included in my books -
> including a picture on how it works, too; thanks to the postive attitude of
> the producer of the system, my acknowledgments to Graham Hodgson (managing
> director of Fluorgas Limited, the producer).
> Graham can be reached directly by e-mail: [log in to unmask]
>
> Yes I know - I have to hurry to publish the books as was asked from me
> several times... I work on it as hard as I can; nobody wants to buy
> 'incomplete' books I suppose - again a message to those who did not yet sent
> in their chapters as promised!!! - Please, let me, and those interested in
> these books, have your valuable contributions.
>
> ----------
> >From: Zachary Sharp <[log in to unmask]>
> >To: [log in to unmask]
> >Subject: Re: fluorine
> >Date: Thu, Nov 30, 2000, 7:01 pm
> >
>
> > Dear fluorine lovers,
> >
> > I am trying to purchase some F2 gas.  I placed an order with a company for
> > high-purity F2, and awaited with a childlike enthusiasm for my 'toy' to
> > arrive.  Unfortunately, I was told several weeks ago that they would no
> > longer supply this product.  I turned to my fall-back plan of buying 97%
> > fluorine from Air Products, only to find out that they too would no longer
> > supply F2 gas.  I fear that F2 is no longer available in the U.S.  Do any
> > of you know of a supplier who is still willing to sell this 'benign' gas?
> > Any leads would be greatly appreciated.
> >
> > Sincerely,
> >
> > Zach